After this change the m41t62.c can be used with RTC subsystem (i.e. date
command) which uses device model (DM).
Signed-off-by: Lukasz Majewski <lu...@denx.de>
---
Changes in v1:
- New
drivers/rtc/m41t62.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 72 insertions(+), 3 deletions(-)
diff --git a/drivers/rtc/m41t62.c b/drivers/rtc/m41t62.c
index cc230e2b78..2dcc1f2a63 100644
--- a/drivers/rtc/m41t62.c
+++ b/drivers/rtc/m41t62.c
@@ -1,5 +1,8 @@
// SPDX-License-Identifier: GPL-2.0+
/*
+ * (C) Copyright 2018
+ * Lukasz Majewski, DENX Software Engineering, lu...@denx.de.
+ *
* (C) Copyright 2008
* Stefan Roese, DENX Software Engineering, s...@denx.de.
*
@@ -15,6 +18,7 @@
#include <common.h>
#include <command.h>
+#include <dm.h>
#include <rtc.h>
#include <i2c.h>
@@ -49,11 +53,23 @@
#define M41T80_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */
+#ifdef CONFIG_DM_RTC
+static int m41t62_rtc_get(struct udevice *dev, struct rtc_time *tm)
+{
+#else
int rtc_get(struct rtc_time *tm)
{
+#endif /* CONFIG_DM_RTC */
u8 buf[M41T62_DATETIME_REG_SIZE];
+#ifdef CONFIG_DM_RTC
+ int ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
+
+ if (ret)
+ return ret;
+#else
i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+#endif /* CONFIG_DM_RTC */
debug("%s: raw read data - sec=%02x, min=%02x, hr=%02x, "
"mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n",
@@ -81,15 +97,28 @@ int rtc_get(struct rtc_time *tm)
return 0;
}
+#ifdef CONFIG_DM_RTC
+static int m41t62_rtc_set(struct udevice *dev, const struct rtc_time *tm)
+{
+#else
int rtc_set(struct rtc_time *tm)
{
+#endif /* CONFIG_DM_RTC */
u8 buf[M41T62_DATETIME_REG_SIZE];
+ int ret;
debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
- i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+#ifdef CONFIG_DM_RTC
+ ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
+#else
+ ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf,
+ M41T62_DATETIME_REG_SIZE);
+#endif /* CONFIG_DM_RTC */
+ if (ret)
+ return ret;
/* Merge time-data and register flags into buf[0..7] */
buf[M41T62_REG_SSEC] = 0;
@@ -108,8 +137,13 @@ int rtc_set(struct rtc_time *tm)
/* assume 20YY not 19YY */
buf[M41T62_REG_YEAR] = bin2bcd(tm->tm_year % 100);
- if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf,
- M41T62_DATETIME_REG_SIZE)) {
+#ifdef CONFIG_DM_RTC
+ ret = dm_i2c_write(dev, 0, buf, sizeof(buf));
+#else
+ ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf,
+ M41T62_DATETIME_REG_SIZE);
+#endif /* CONFIG_DM_RTC */
+ if (ret) {
printf("I2C write failed in %s()\n", __func__);
return -1;
}
@@ -117,15 +151,50 @@ int rtc_set(struct rtc_time *tm)
return 0;
}
+#ifdef CONFIG_DM_RTC
+static int m41t62_rtc_reset(struct udevice *dev)
+{
+#else
void rtc_reset(void)
{
+#endif /* CONFIG_DM_RTC */
u8 val;
/*
* M41T82: Make sure HT (Halt Update) bit is cleared.
* This bit is 0 in M41T62 so its save to clear it always.
*/
+#ifdef CONFIG_DM_RTC
+ int ret = dm_i2c_read(dev, M41T62_REG_ALARM_HOUR, &val, sizeof(val));
+
+ val &= ~M41T80_ALHOUR_HT;
+ ret |= dm_i2c_write(dev, M41T62_REG_ALARM_HOUR, &val, sizeof(val));
+
+ return ret;
+#else
i2c_read(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
val &= ~M41T80_ALHOUR_HT;
i2c_write(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
+#endif /* CONFIG_DM_RTC */
}
+
+#ifdef CONFIG_DM_RTC
+static const struct rtc_ops m41t62_rtc_ops = {
+ .get = m41t62_rtc_get,
+ .set = m41t62_rtc_set,
+ .reset = m41t62_rtc_reset,
+};
+
+static const struct udevice_id m41t62_rtc_ids[] = {
+ { .compatible = "st,m41t62" },
+ { .compatible = "microcrystal,rv4162" },
+ { }
+};
+
+U_BOOT_DRIVER(rtc_m41t62) = {
+ .name = "rtc-m41t62",
+ .id = UCLASS_RTC,
+ .of_match = m41t62_rtc_ids,
+ .ops = &m41t62_rtc_ops,
+};
+#endif /* CONFIG_DM_RTC */
--
2.11.0
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